Please use this identifier to cite or link to this item:
https://doi.org/10.1115/1.2783888
DC Field | Value | |
---|---|---|
dc.title | Non-Gaussian random wave simulation by two-dimensional fourier transform and linear oscillator response to Morison force | |
dc.contributor.author | Zheng, X.Y. | |
dc.contributor.author | Moan, T. | |
dc.contributor.author | Quek, S.T. | |
dc.date.accessioned | 2014-06-17T08:21:39Z | |
dc.date.available | 2014-06-17T08:21:39Z | |
dc.date.issued | 2007-11 | |
dc.identifier.citation | Zheng, X.Y., Moan, T., Quek, S.T. (2007-11). Non-Gaussian random wave simulation by two-dimensional fourier transform and linear oscillator response to Morison force. Journal of Offshore Mechanics and Arctic Engineering 129 (4) : 327-334. ScholarBank@NUS Repository. https://doi.org/10.1115/1.2783888 | |
dc.identifier.issn | 08927219 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/65873 | |
dc.description.abstract | The one-dimensional fast Fourier transform (FFT) has been applied extensively to simulate Gaussian random wave elevations and water particle kinematics. The actual sea elevations/kinematics exhibit non-Gaussian characteristics that can be represented mathematically by a second-order random wave theory. The elevations/kinematics formulations contain frequency sum and difference terms that usually lead to expensive time-domain dynamic analyses of offshore structural responses. This study aims at a direct and efficient two-dimensional FFT algorithm for simulating the frequency sum terms. For the frequency-difference terms, inverse FFT and forward FFT are implemented, respectively, across the two dimensions of the wave interaction matrix. Given specified wave conditions, the statistics of simulated elevations/kinematics compare well with not only the empirical fits but also the analytical solutions based on a modified eigenvalue/eigenvector approach, while the computational effort of simulation is very economical. In addition, the stochastic analyses in both time domain and frequency domain show that, attributable to the second-order nonlinear wave effects, the near-surface Morison force and induced linear oscillator response are more non-Gaussian than those subjected to Gaussian random waves. Copyright © 2007 by ASME. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1115/1.2783888 | |
dc.source | Scopus | |
dc.subject | Morison force | |
dc.subject | Two-dimensional fast Fourier transform (FFT) | |
dc.subject | Wave nonlinearity | |
dc.type | Article | |
dc.contributor.department | CIVIL ENGINEERING | |
dc.description.doi | 10.1115/1.2783888 | |
dc.description.sourcetitle | Journal of Offshore Mechanics and Arctic Engineering | |
dc.description.volume | 129 | |
dc.description.issue | 4 | |
dc.description.page | 327-334 | |
dc.identifier.isiut | 000251302200009 | |
Appears in Collections: | Staff Publications |
Show simple item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.